Bahadurgarh Environmental Lab · NABL TC-7710 · CPCB discharge standards

Wastewater & Effluent Testing — CPCB Discharge Compliance

Q: How is ZLD compliance monitoring different from normal effluent testing?

Zero Liquid Discharge (ZLD) compliance is about verifying the quality of treated and recovered water, not just the raw effluent. In a ZLD system there is no (or negligible) discharge to the environment, so monitoring confirms that the treatment / recovery train (RO, evaporation, crystallisation) is achieving the recovered-water quality for reuse and that any residual stream meets discharge standards before release. This is a separate, growing compliance driver from raw-effluent testing: we test the recovered permeate / condensate quality and the reject / residual stream so you can demonstrate true zero discharge or compliant residual discharge to the SPCB.

Q: How should wastewater samples be collected for testing?

Wastewater samples should be collected in clean polyethylene or glass bottles depending on the parameters. Grab samples represent a single point in time; 24-hour time-weighted composite samples are preferred for compliance monitoring. Samples for BOD and microbiology must be kept at 4 °C and reach the lab within 24 hours. Heavy-metal samples require acidification to pH < 2 with HNO₃, and oil-and-grease samples need a separate glass container with no headspace rinsing. We provide sampling kits and parameter-specific guidance, and confirm the volume needed with your SPOC.

Q: What is the regulatory consequence of non-compliant effluent discharge?

Effluent discharge is enforced under the Water (Prevention and Control of Pollution) Act 1974 and the Environment (Protection) Act 1986. Discharging above the consent limits can trigger SPCB show-cause notices, closure / disconnection directions, and prosecution, and is a frequent National Green Tribunal (NGT) matter. Consent to Operate renewal is conditional on demonstrating effluent compliance through periodic NABL-accredited monitoring. Maintaining a regular monitoring record is the simplest way to evidence compliance and catch ETP / STP performance drift before it becomes a violation.

Q: Are Auriga wastewater reports accepted by SPCBs and for ZLD / consent compliance?

Yes. Because testing is performed under the Bahadurgarh lab's NABL TC-7710 accreditation using CPCB / APHA Standard Methods, the reports are accepted by State Pollution Control Boards for Consent to Operate and consent renewal, for environmental clearance conditions, for CETP membership compliance, and for ZLD verification. Reports present the measured values against the applicable general / sector-specific discharge standard, with the accreditation reference, formatted for direct SPCB submission.

Effluent that exceeds consent limits can trigger an SPCB closure direction or an NGT matter — and Consent to Operate renewal is conditional on demonstrating compliance through regular monitoring. Auriga Research is a NABL-accredited wastewater testing laboratory serving industrial units, STPs, ETPs, and CETPs across India, covering all CPCB-prescribed discharge parameters and the relevant sector-specific standards.

Our scope covers pH, BOD, COD, TSS, TDS, oil and grease, heavy metals, phenols, cyanides, nitrogen forms, phosphates, and sulphates, with sector-specific discharge standards for pharmaceutical and food / dairy processing (both have MoEFCC-notified limits under the EP Rules 1986) and other industries. ZLD compliance monitoring covers treated-effluent and recovered-water quality verification — confirming discharge standards are met before any residual discharge, or verifying complete recovery in zero-discharge systems.

Testing is conducted at our Bahadurgarh Environmental & Industrial Monitoring Laboratory (NABL TC-7710), accredited for effluent and wastewater parameters per CPCB standards. Backed by the Arbro Group's analytical heritage — Arbro Lab since 1990, Auriga Research since 2007 — with NABL ISO/IEC 17025 accreditation, our reports are accepted by SPCBs for Consent to Operate, CETP membership, and ZLD verification.

Routine parameters 3–5 days | BOD 5–7 days | Full characterisation 7–10 days

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Wastewater Testing Parameters

Each parameter is mapped to its method or driver so EHS and ETP teams can match scope to the CPCB / sector discharge standard at a glance.

BOD

Biochemical Oxygen Demand

5-day incubation at 20 °C — the core organic-load discharge parameter.

COD

Chemical Oxygen Demand

Dichromate open / closed reflux method.

TSS / TDS

Suspended & Dissolved Solids

Total suspended and total dissolved solids by gravimetric analysis.

pH / Cond.

pH, Conductivity, Turbidity

Electrometric pH, conductivity, and turbidity field parameters.

O & G

Oil & Grease

Oil and grease by the partition-gravimetric method.

Heavy Metals

Cr, Pb, Cd, Ni, Zn, Cu, Hg, As by ICP-MS / AAS.

Phenol / CN

Toxic Organics & Cyanide

Phenols, cyanides, fluorides, and sulphides.

N-forms

Nitrogen Forms

Ammoniacal nitrogen, nitrate, and total Kjeldahl nitrogen (TKN).

PO₄ / SO₄

Nutrients & Salts

Phosphates and sulphates.

Sector Std

Sector-Specific Limits

Pharmaceutical, food / dairy, textile, and other industry-specific discharge standards notified under the EP Rules 1986.

ZLD

ZLD Verification

Treated-effluent and recovered-water quality to confirm zero-liquid-discharge recovery or pre-discharge compliance.

How It Works

Get a Quote

Share your discharge type (industrial effluent, STP, ETP, CETP, or ZLD recovered water), your industry sector, and the purpose (SPCB consent, CETP membership, or ZLD verification). Your dedicated SPOC confirms the parameter panel, the applicable general / sector-specific discharge standard, and whether grab or 24-hour composite sampling is needed before you dispatch anything.

Sample Collection & Dispatch

Collect grab or 24-hour composite samples in the correct containers (acidified for metals, chilled to 4 °C for BOD), or have our team field-sample, with full chain of custody. Each sample is bar coded and registered in YLIMS, Auriga's in-house Laboratory Information Management System, on receipt at the Bahadurgarh lab — BOD samples are set up within the holding time.

Testing & QA Review

Your effluent is analysed at the Bahadurgarh lab (NABL TC-7710) by APHA Standard Methods / CPCB protocols — BOD, COD, solids, oil and grease, heavy metals by ICP-MS / AAS, and the sector-specific parameters as scoped. Every result is compared against the applicable discharge standard and passes a formal internal QA review and sign-off before the report is generated.

Receive Your NABL Report

Your NABL-accredited wastewater report is delivered digitally within the committed turnaround time. Reports carry Auriga's NABL accreditation under ISO/IEC 17025:2017, present the measured values against the general / sector-specific discharge standard, and are accepted by SPCBs for Consent to Operate, CETP membership, and ZLD verification. Track sample status in real time through YLIMS.

Turnaround Time

Service	Standard TAT	Express
Routine parameters (pH, TSS, TDS, oil & grease)	3–5 business days	Available
BOD (5-day incubation)	5–7 business days	— fixed by incubation
COD & nutrient parameters	5–7 business days	Available
Heavy metals by ICP-MS / AAS	7–10 business days	On request
Complete effluent characterisation	7–10 business days	On request
ZLD recovered-water + residual verification	7–10 business days	On request

Who Needs Wastewater Testing

Industries discharging to waterways, sewers, or land under SPCB Consent to Operate conditions.
Pharmaceutical and food / dairy manufacturers with ETP systems under sector-specific discharge standards.
ETP and STP operators verifying treatment efficiency and certifying treated-water quality.
CETP operators and members monitoring combined and individual effluent quality.
ZLD facilities and industrial estates verifying recovered-water quality and zero / residual discharge.
Textile, tannery, electroplating, and chemical units with high-strength or metal-bearing effluent.
Real estate, hospitality, and township STPs certifying treated sewage for reuse / discharge.
EIA consultants assessing industrial wastewater impacts for environment clearance.
Industries renewing Consent to Operate needing periodic compliance monitoring records.
EHS teams tracking ETP / STP performance drift before it becomes a violation.

Why Auriga for Wastewater Testing

Bahadurgarh Environmental Lab — NABL TC-7710

Auriga's primary environmental testing facility, accredited for effluent and wastewater parameters per CPCB standards under the Chemical — Environment & Pollution discipline.

General + sector-specific standards

Reported against the EP Rules 1986 Schedule VI general standards and the industry-specific limits for pharmaceutical, food / dairy, textile, and other sectors — not a one-size-fits-all comparison.

ZLD verification, not just raw effluent

We test recovered permeate / condensate and the reject / residual stream so a ZLD facility can demonstrate true zero discharge or compliant residual discharge — the distinct, growing compliance driver.

Full metals + organics + nutrients in one lab

BOD / COD, ICP-MS heavy metals, phenols / cyanides, and nutrient forms all under one accreditation — one consolidated effluent report, no cross-lab handover.

Reports built for SPCB / CETP submission

Formatted for direct attachment to Consent to Operate, CETP membership, and ZLD compliance submissions, with the applicable standard and accreditation reference included.

Arbro Group analytical heritage

Established analytical heritage through the Arbro Group (Arbro Lab since 1990, Auriga Research since 2007), with NABL ISO/IEC 17025 accreditation — the audit trail EHS managers, ETP operators, and SPCB reviewers look for in an effluent-testing partner.

Related Services

Frequently Asked Questions

What parameters are tested in industrial wastewater?

Industrial wastewater testing covers pH, BOD (biochemical oxygen demand), COD (chemical oxygen demand), TSS (total suspended solids), TDS (total dissolved solids), oil and grease, heavy metals (Cr, Pb, Cd, Ni, Zn, Cu, Hg, As), phenols, cyanides, fluorides, sulphides, ammoniacal nitrogen, nitrate, total Kjeldahl nitrogen, phosphates, and sulphates. The exact panel depends on the industry type and SPCB consent conditions — textile effluent additionally requires colour, and pharmaceutical effluent may require specific drug-residue testing.

Which Auriga lab performs wastewater testing?

Wastewater testing is conducted at our Bahadurgarh Environmental & Industrial Monitoring Laboratory (NABL TC-7710), accredited for effluent and wastewater parameters per CPCB standards. The Bahadurgarh lab's NABL ISO/IEC 17025:2017 scope covers the Chemical — Environment & Pollution discipline. We provide sampling kits and guidance, and can arrange field sampling (grab or 24-hour composite) before analysis at the lab.

What are the CPCB discharge standards for treated wastewater?

CPCB specifies general discharge standards under the Environment (Protection) Rules, 1986 (Schedule VI). Key limits for discharge into inland surface waters include pH 5.5–9.0, BOD < 30 mg/L, COD < 250 mg/L, TSS < 100 mg/L, and oil and grease < 10 mg/L (limits differ for discharge to public sewers, land for irrigation, and marine outfalls). On top of these, the EP Rules carry industry-specific discharge standards — for example pharmaceutical manufacturing and food / dairy processing each have their own MoEFCC-notified limits — and CETP / ZLD conditions may impose stricter requirements. We report your effluent against the standard applicable to your sector and consent.

How is ZLD compliance monitoring different from normal effluent testing?

Zero Liquid Discharge (ZLD) compliance is about verifying the quality of treated and recovered water, not just the raw effluent. In a ZLD system there is no (or negligible) discharge to the environment, so monitoring confirms that the treatment / recovery train (RO, evaporation, crystallisation) is achieving the recovered-water quality for reuse and that any residual stream meets discharge standards before release. This is a separate, growing compliance driver from raw-effluent testing: we test the recovered permeate / condensate quality and the reject / residual stream so you can demonstrate true zero discharge or compliant residual discharge to the SPCB.

How should wastewater samples be collected for testing?

Wastewater samples should be collected in clean polyethylene or glass bottles depending on the parameters. Grab samples represent a single point in time; 24-hour time-weighted composite samples are preferred for compliance monitoring. Samples for BOD and microbiology must be kept at 4 °C and reach the lab within 24 hours. Heavy-metal samples require acidification to pH < 2 with HNO₃, and oil-and-grease samples need a separate glass container with no headspace rinsing. We provide sampling kits and parameter-specific guidance, and confirm the volume needed with your SPOC.

What is the regulatory consequence of non-compliant effluent discharge?

Effluent discharge is enforced under the Water (Prevention and Control of Pollution) Act 1974 and the Environment (Protection) Act 1986. Discharging above the consent limits can trigger SPCB show-cause notices, closure / disconnection directions, and prosecution, and is a frequent National Green Tribunal (NGT) matter. Consent to Operate renewal is conditional on demonstrating effluent compliance through periodic NABL-accredited monitoring. Maintaining a regular monitoring record is the simplest way to evidence compliance and catch ETP / STP performance drift before it becomes a violation.

Are Auriga wastewater reports accepted by SPCBs and for ZLD / consent compliance?

Yes. Because testing is performed under the Bahadurgarh lab's NABL TC-7710 accreditation using CPCB / APHA Standard Methods, the reports are accepted by State Pollution Control Boards for Consent to Operate and consent renewal, for environmental clearance conditions, for CETP membership compliance, and for ZLD verification. Reports present the measured values against the applicable general / sector-specific discharge standard, with the accreditation reference, formatted for direct SPCB submission.

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